11221321312989 has 12 divisors (see below), whose sum is σ = 16767491617500. Its totient is φ = 7222919465664.

The previous prime is 11221321312961. The next prime is 11221321313087. The reversal of 11221321312989 is 98921312312211.

11221321312989 is a `hidden beast` number, since 1 + 1 + 2 + 2 + 1 + 321 + 31 + 298 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2816204204025 + 8405117108964 = 1678155^2 + 2899158^2 .

It is not a de Polignac number, because 11221321312989 - 2¹³ = 11221321304797 is a prime.

It is a super-2 number, since 2×11221321312989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221321312919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21496783864 + ... + 21496784385.

It is an arithmetic number, because the mean of its divisors is an integer number (1397290968125).

Almost surely, 2^{11221321312989} is an apocalyptic number.

It is an amenable number.

11221321312989 is a deficient number, since it is larger than the sum of its proper divisors (5546170304511).

11221321312989 is a wasteful number, since it uses less digits than its factorization.

11221321312989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42993568284 (or 42993568281 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The spelling of 11221321312989 in words is "eleven trillion, two hundred twenty-one billion, three hundred twenty-one million, three hundred twelve thousand, nine hundred eighty-nine".